redsea is an FM-RDS* decoder for Linux / macOS that outputs newline-delimited JSON (ndjson).

The idea of redsea is to be something of a logger or a converter. The main problem we are solving is this: how to take data meant for real-time display and meaningfully print it as self-sufficient log entries instead?

This wiki contains information that goes past the readme.

It's highly recommended to read through this wiki to understand how redsea works.

• Installation
• Building on a low-end system
• Command line options
• Input formats
• Supported RDS features (and JSON format description)
• Use cases

And some discussion on Redsea internals:

• Benchmark results
• RDS clock recovery from pilot tone?
• Time and timestamps
• Some RadioText research
• Error detection and correction
• WAV versus PCM, what's the difference?

*) RDS is what enables your car radio to display the station name and the song playing.